ALTERNATIVE EXPLANATIONS OF THE DEPENDENCE OF THE DENSITY OF CENTERS ON THE DENSITY OF POPULATION
建立多个模型解释服务中心密度与人口密度之间的关系，发现指数通常为三分之二，但实际数据中更接近1，并讨论了模型在美国数据中的应用。
"The paper is devoted to modeling the relationship between the density of service centers and the density of population (or...the density of demand). Several models lead to an exponential function with the exponent equal to [two-thirds]. For a number of real systems of centers, the power is considerably different from [two-thirds] (more often it is nearer to 1). I describe a series of models that explain this difference." The application of the model to U.S. data is discussed.